Antifriction-bearing.



E. S. WOODS.

ANTIFRIGTION BEARING.

APPLICATION FILED DEO.10, 1908.

979,120., Patented Dec. 20, 1910.

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ANTIFRIGTION BEARING. APPLICATION FILED DEG.10, 1908.

9'?9, 120. Patented Dec. 20, 1910.

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EDWIN S. VIOODS, OF CHICAGO, ILLINOIS.

ANTIERICTION-BEARING.

To all whom it may concern:

Be it known that I, EDWIN S. Woons, a citizen of the United States, anda resident of Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in AntifrictionBearings;and I do hereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,and to the letters of reference marked thereon, which form a part ofthis specification.

This invention relates to improvements in antifriction bearings, and theinvention consists in the matters hereinafter set forth and moreparticularly pointed out in the appended claims.

The invention is herein shown as embodied in a type of bearingconstructed and arranged to be applied as a side bearing for railwaycars, but certain features of the invention are applicable to bearingsfor other uses, as for instance. center bearings for railway cars andthe like, as will hereinafter appear.

In the drawings :Figure 1 is a section of an antifriction bearingembodying my invention, taken longitudinally through the carrier orcasing. Fig. 2 is a plan view thereof, partially broken away, toillustrate the construction beneath. Fig. 3 is atransverse section online 33 of 1. Fig. 4C is a longitudinal section of a modified form ofbearing. ig. 5 is a transverse section illustrating anothermodification. Fig. 6 is a transverse section illustrating a stillfurther modification.

The antifriction bearing herein illustrated is of that type wherein theantifriction ele ment, as a roller or rocker, is provided withoppositely extending trunnions or end bearings by which the antifrictionelement is supported on tracks or ledges in the carrier when saidantifriction element is out of contact with the upper and lower bearingsurfaces, and in which the tracks are so arranged as to automaticallybring the roller, when free, to a central or other desired position inthe carrier. The application of the several features of my inventionwill be hereinafter specifically described with respect to this type ofbearing, but the following description is not intended to imposelimitations upon the general application of the invention, certainfeatures of which are Specification of Letters Patent.

Application filed December 10, 1988.

Patented Dec. 20, 1910.

Serial No. 466,751.

applicable to other forms of antifriction bearings for this andanalogous uses.

The carrier 10 of the bearing comprises end walls 11, 11 and side walls12, 12 which inclose a chamber in which is located the antifrictionelement 13, herein shown as having the form of a cylindric rollerprovided with end hearings or trunnions 14, 14 adapted for engagementwithtracks on the side walls of the casing. The carrier is open at itslower side and the roller projects therethrough for engagement with alower bearing 15. When the device is employed as the side bearing forrailway cars the carrier will usually be attached to and depend from thebody bolster, and the upwardly facing bearing member 15 will be attachedto the truck bolster. The upper bearing member, which the roller engageswhen the load is transmitted therethrough, comprises a wear plate ormember 17 suitably supported in the upper wall of the carrier.

20, 20 designate tracks, arranged longitudinally one at each side of thecarrier for engagement with the trunnions or end bearings of theantifriction element 13. Heretofore such tracks have been madestationary with, or integral parts of, the side walls of the carrier andlocated at such distance from the upper bearing member 17 that when theantifriction element is free from the upper and lower bearing members,it drops downwardly with its trunnions resting on the tracks. Thisconstruction has been criticised, especially in passenger our work,because of tendency of the parts to rattle when the roller orantifriction element is free. In order to overcome this objection. saidtracks may have the form of bars 20 which are movable relatively to thecarrier, and may be placed under the influence of suitably locatedresilient means, as springs, which act through the track bars and thetrunnions to hold the antifriction element up against the upper bearingmember when said antifriction element is free from the lower bearingmember. The construction herein illustrated embodying this feature ofthe invention is most clearly shown in Figs. 1. 8 and i and is made asfollows: The track bars 20 lie along the inner faces of the side wallsof the carrier above flanges or shoulders 22 which extend inwardly fromthe lower margins of said side walls. The said track bars 20 areyieldingly supported on the flanges 22 through the medium of springsEli-3, siown as ha vii the form of spiral acting arena-0 in Figs. 1 to 8removable. and when said parts are removed an opening is provided in 1described. Said parts may 5 when the carrier is attached to a bolster orIn the present instance the said track bars 20 are inclined inwardly anddownwardly on their upper faces so as to permit the roller, when freefrom the lower hearing 15, to roll by gravity to the central positionindicated in Fig. l, or to any other position within the carrier asdesired. The force exerted by resilient means, as the spring 225, isapplied in such a way as to assist gravity to return the antifrictionelement. as

the roller to its central. or other position in the carrier when freefrom contact with the lower bearing nien'iber. The under sides of saidtrack bars are grooved or otherwise cut away to receive the springs inFig. l l have shown this failure of the invention applied to a hearingin which the antifriction element has he general form of the segment ofa cylinder; it having a lower bearing are 25 for engagement with thelower bearing member 15 and an upper shorter hearing are 2%.) forengagement with the bearing member 30 therein shown. Said arcs may ormay not be struck from the same radius. The carrier is open at its topto receive the antifriction element 27 and the bearing member or wearplate 30 comprises a flat steel bar which is removably fitted in theupper part of the carrier to constitute the top wall thereof, as hereinshown. The top the carrier may be recessed. to re ceive the wear plateor hearing member 30 to bring its upper face flush with the upper faceof the attaching lugs 36 at the ends of the carrier. By this arrangementthe wear plate may be held in place between the carrier anl the support,as a car bolster, to which it is attached. desired. screws 31 may extendthrough the wear plate into the end walls to temporarily hold the wearplate in place before it is applied to the bolster or other support andthereby hold the parts of the bearing assembled. The antifrictionelement 27 has trunnions 33 which are engaged with the yielding trackbars 20. through the medium of which latter the anther supporting part,by means of bolts passing through the attaching lugs 36 at the endsthereof) between the carrier and the part to which the carrier isattached. "W hen the carrier is thus open at its top to receive theantifriction member it may he provided in its side walls with notchesthrough which the trunnions of the antifriction n'ieinber pass when thelatter is being inserted into or removed from the carrier. In accordancewith one feature of my invention, the said notches lead indirectly fromthe open side of the carrier to the tracks. each notch comprising upperand lower parts 37, 38, re spectively, arranged vertically out of linewith each other and horizontally connected, as most clearly shown inFig. 1. That is to say the upper parts of the trunnion receiving notchesmay be located near the longitudinal center of the carriage while thelower parts 38 thereof may be located adizv cent to one end of thecarrier.

In the construction shown in Figs. 1 to 23, inclusive. the side walls ofthe carrier are cored out to lighten the same, and. are formed withupper and lower strengthening and wear ribs 5L0, 4L1. Between said upperand lower ribs are formed channels and between the lower ribs and thetrack l 11's are formed other channels 4-3. which latter correspond tothe usual channels in this general type of hearing as heretoforeconstructed and into which the t-runnions extend.

When the carrier is constructed as described, the upper part 37 of thetrunnion receiving notch at each side of the carrier is formed throughthe upper rib 4H) of the side wall and the lower part 38 of said notchformed through the lower rio ll of said wall. The channels 42 constitutehorizontal connections between the upper and lower ojtl'set parts of thenotches. When the trunnions or end bearings are tapered. as hereinshown. the vertical portions of the notches may be made V-shaped. asshown in Fig. l and 2.

When inserting the antifriction element into the carrier the trunnions143: will. first pass through the upper or centrally located parts 37 ofthe trunnion notches until the trunnions are brought to the level of thechannels l Thereafter the said antifriction member is shifted endwise ofthe carrier until the trunnions are brought into line with the lowerparts 38 of the notches, after which the antifriction member is free topass to its position in the carrier with the trunnions occupying thelower channels 43. Obviously, the same results will be obtained bylocating the two parts of the notch of each wall at different distancesfrom the end wall or at different relative distances from each other solong as said parts are out of line and the trunnions of the antifrictionelement may pass therethrough. The purpose of arranging the upper andlower parts of the notches out of line with each other is to avoidweakening the central portions of the side walls of the carrier, such asoccurs when the notches for the trunnions extend directly from the outeror open side of the carrier to the channel which the trunnions normallyoccupy.

Practice has demonstrated the necessity for strengthening the notchedside walls of open topped carriers as heretofore constructed. Saidnotched side walls have been exteriorly ribbed in prior constructions.The arrangement of the notches as herein shown avoids the necessity ofeXteriorly ribbing the side walls of the carrier, thereby making itpossible to lighten the carrier, as a whole and making it more compactto occupy less space.

In accordance with another feature of my invention, one of the bearingmembers is movable relatively to the walls of the carrier and issupported by means permitting it to slightly rock or tilt relatively tothe carrier, or to the other bearing member, in such manner that theantifriction member or means will always be presented for proper bearingcontact with the upper and lower bearing members at times when weight isbeing transmitted therethrough, regardless of inaccuracies of adjustmentof the upper and lower bearing members or the parts by which they arecarried. As shown in Figs. 1. to 3 inclusive, the wear plate or upperbearing member 17 is thus loosely mounted in the carrier. in said Figs.1 to 23, inclusive, is shown one practical construction and arrangementof the parts which support the bearing member or wear plate on thecarrier, permitting a rocking or oscillatory movement of the wear platefor the purpose set forth. As shown in said figures. the plate 34, whichis loosely interposed between the filler plate 38 and the wear plate 17,has a flat lower side for engagement with the flat upper side of thewear plate, and is transversely rounded on its upper side to engage acomplemental surface on the under side of the filler plate. Thus thewear plate or member 17 is free to rock on its lon gitudinal axis toadjust itself to the face of the roller or antifriction member. That isto say, the bearing member or wear plate 17 is capable of rocking oroscillating about the longitudinal axis of the wear plate, which axis istransverse to the line contact between the roller 13 (or other similarform of antifriction element) and the wear plate. Thus, if the face ofthe roller be not pre sented to the wear plate for accurate engagementtherewith throughout its length or line contact, or, if its line contactbe out of parallel with the adjacent face of the wear plate, said wearplate free to rock or osc llate to accurately adjust itself to theroller or other like antifriction element which has a line contact withsaid wear )late. In Fig. l have shown this feature of my inventionapplied to a slightly modified form of the bearing. In this constructionthe wear plate 57 is itself transversely rounded on its upper side tofit a complemental surface on the under side of the filler plate that isarranged to be interposed between the wear plate and the bolster orother support to which the bearing is attached. "referably, in thisconstruction, the wear plate is couvexly rounded to avoid weakening thesame. The same general results may be secured by convexly rounding thefiller plate 58 in its part which bears against the under side of thebolster or other support and arranging the filler plate loosely withinthe carrier. Again the wear plate 67 (shown in Fig. 6) may be convexlyrounded on its upper side in its part which engages the support to whichthe carrier is attached and arranged to it loosely within the open topof the carrier to afford the necessary capacity for rocking oroscillating to adjust itself to the antifriction element. Moreover, thelower bearing mem ber 15 may be loosely mounted on its support topern'lit it to rock or oscillate for the same purpose. As a means forsupporting the bearing members or wear plates, thus loosely mounted inthe carrier, said wear plates may extend at their side margins outwardlyover upwardly facing parts of the carrier walls. As shown in Figs. 1 to3, inclusive, the wear plate or bearing member rests on the ribs at),which latter are depressed such distance below the open top of thecarrier as to afiord space or room for the wear plate 17, theoscillatory plate 34 and the filler plate of the top wall structure. Inthe construction shown in F the wear plate 57 rests atits side marginson upwardly facing surfaces 59 of the side walls of the carrier locateda suitable dis tance below the level of the open top of the carrier. Theinner margins of the wear plate supporting surfaces are elevated abovethe main portions thereof, as shown in sa d figure, so as to permit theintended rocking movement of the plates or bearing members. whilesupporting them from end to end thereof.

Means are provided, in the construction shown in Figs. 1 to 8,inclusive, for locking the tiller plate to the carrier and therebyholding the parts assembled during handling and transportation thereof.As herein shown, the wear plate 17, the rocking inemher 3st and thefiller plate 33 are made of less length than the top wall of the carrierand are longitudinally contained between flanges (30, of the top wall ofthe carrier, formed by transversely coring out the said top wall nearthe ends of the carrier. T he filler plate 33 is rimmed at its upperside and is at tached at its ends to the flanges 60 by means of cotterpins 62 which extend through the flanges (30 and the end rims of thefiller plate. As a further improvement I may provide, in an open topbearing of this character, means extending, or bridged, between the sidewalls of the carrier and interlocked with said side walls thereof in amanner avoiding tendency of the side walls to spread apart. Such featureof construction is especially useful and valuable in an open top bearingin which the side walls of the carrier are notched (and thereforesomewhat weakened) for the introduction of the trun-' nionedantifriction element.

As shown in Figs. 2 and 3, the trans versely arranged interlocking meansembraces the filler plate It is provided at its side margins withdownwardly turned hook shaped flanges 65, 65 which engage upwardlyturned, like shaped flanges 66, 66 near the upper margins of the sidewalls of the carrier.

In Fig. 6 l hav shown the interlocking connection occurring between thewear plate 67 itself and the side walls of the carrier. In thisconstruction the wear plate 67 is provided at its edges with down turnedhook shaped flanges 68 which engage up wardly directed hook shapedflanges 69 at the sides of the carrier walls near the upper marginsthereof. The wear plate shown in Fig. 6 may be a drop forging.

it will be observed that the open top type of the carrier, wherein theantifriction device or member is inserted into the carrier through theopen top thereof, and wherein the side walls of the carrier are notchedto permit the trunnions to pass into and out of the carrier, the wearplate or hearing member serves, when in place, to hold the antifrictionmember in the casing. Certain of the features of the invention may,however, be applied to bearings having other means for introducing theantifriction member into the carrier.

The tapered form of the trunnions herein shown possesses generaladvantages in manufacture and use as follows: Said trunnions arestronger than cylindric trunnions, weight for weight, and being ofgreatest diameter at their junctions with the ends of the rollers areless liable to crack or break in casting,

due to contraction during the cooling of the metal. Moreover, by reasonof the fact that the trunnions meet the bodies of the antifrictionelements at obtuse angles, or angles greater than a right angle, thesurfaces of the trunnions are left smooth in the casting operation,there being little or no tendency to an irregular formation of thetrunnion at the angle etween the trunnion and end face of the roller orantifriction element, such as is likely to occur when the angles aresharper, as right angles. finch irregular formation of the trunnions,when present, interferes with the proper rolling of the trunnions on thetracks. ldoreover, the tapering of the trunnions outwardly, as shown,permits the notches in the side walls of the carrier, through which thetrunnions pass when the antifriction element is introduced into andmoved from the carrier, to be made smaller, with a result of lesseningthe weakening of the side walls, due to the presence of such notches.Thus the notches may be made V- shaped.

in the application of the rocking hearing member feature of theinvention to a center bea *ing, embracing a plurality of radially rangedrollers between upper and lower bearing members, the rocking bearingmember may be arranged for universal rocking motion to permit it to rockon axes transverse to the planes of all the lines of contact between therollers and bearing members.

I claim my invention 1. An antifriction bearin g comprising upper andlower bearing members, an interposed element through the body of whichthe load is carried and provided with. end hearings or trunnions, andresilient means which act on said trunnions to yieldingly hold theantifriction element engaged with one of the bearing members when it isfree from the other bearing member.

2. An antifriction bearing com n'ising upper and lower bearing members,and an in terposed antifriction element arranged to roll along saidbearing member and having end hearings or trunnions, the upper bearingmember being provided with yielding tracks arranged to engage saidtrunnions and to yieldingly hold the antifrietion ele ment engaged withthe upper bearing memher when it is free from the lower bearing member.

An antifriction bearing comprising upper and lower bearing members, andan interposed antifriction elen'ient, one of said members havingresilient means to yieldingly hold the antifriction element against oneof the hearing members when it is free from the other bearing member,said resilient means tending to automatically return said antifrictionelement to a predetern'iined position when free from said other bearingmember.

4. An antifriction bearing comprising a carrier provided with adownwardly facing bearing member, an antitriction element in saidcarrier adapted to roll along said bearing member and provided with endbearings or trunnions, and tracks yieldingly mounted in the carrieralong which the trunnions roll, said tracks being arranged to act onsaid trunnions to yieldingly hold said antifriction element inengagement with said bearing member of the carrier.

5. An antifriction bearing comprising a carrier provided with anelongated downwardly facing bearing member, an antitriction roller insaid carrier adapted to roll along said bearing member, and resilientmeans carried by said carrier and acting upon the ends of said roller toyieldin 'ly hold it engaged with said bearing member.

6. An antifrietion bearing comprising a carrier provided at its top wallwith a bearing member, said carrier being open at its bottom andprovided near its open bottom with flanges or shoulders, track barswithin the carrier above said shoulders, springs interposed between saidtrack bars and shoulders, and an antitriction element in said carrierengaging said bearing member and having end hearings or trunnionsadapted for engagement with the track bars.

7. An antifriction bearing comprising a carrier provided at its top wallwith a bearing member, said carrier being open at its bottom andprovided near its open bottom with flanges or shoulders, track barswithin the carrier above said shoulders, springs interposed between saidtracks and shoulders, and an antifriction element in said carrierengaging said bearing member and having end bearings or trunnionsadapted for engagement with the track bars, the end walls of the carrierhaving parts beneath which the ends of the track bars extend to limitthe upward movement of said track bars.

8. A11 antifriction bearing comprising a carrier provided with adownwardly facing bearing member, an antifriction element in saidcarrier arranged to roll along said bearing member and provided with endbearings or trunnions, tracks upon which said trunnions rest and rolland arranged to permit the antifriction element to return to apredetermined point in its path of travel, and springs applied to saidtrack to hold the antifriction element in contact with said bearingmember and to assist the return or restoring movement of theantifrietion element.

9. An antifriction bearing comprising upper and lower bearing membersand supports therefor, an antifriction element interposed between andarranged to roll along said bearing members, said antifriction elementhaving end bearings or trunnions, and tracks upon which said trunnionsrest and roll when the antifriction element is released from contactwith one of said bearing mem bers, one of said bearing members havingrocking movement relative to its support.

10. An antitriction bearing comprising an upper and a lower bearingmember, an antit'riction element interposed between the same for linecontact with said bearing members, one of the bearing members beingarranged to oscillate relatively to its'support, and a rocking memberloosely interposed between said oscillatory bearing member and itssupport and being transversely rounded for engagement with the adjacentside of one of the parts between which it is interposed.

11. An antit'riction bearing comprising a carrier provided at its topwith an elongated bearing member arranged to rock or oscillate about itslongitudinal axis relative to the carrier body, and antifriction meansmounted in the carrier adapted for contact with said bearing member.

12. An antit'riction bearing comprising a carrier, antifriction meansmounted therein having end bearings or trunnions, tracks on the carrieradapted to engage said trunnions, and an elongated bearing membermounted in the wall of the carrier to have a rocking or oscillatorymovement about its longitudinal axis relatively to the carrier.

13. An antifriction bearing comprising a casing or support, anantifriction element, a bearing member loosely mounted relatively tothecarrier or support for engagement with the antiiriction element, afiller plate in the carrier or support, and a rocking member looselymounted between the filler plate and said bearing memberl ll. Anantitriction bearing comprising a carrier open at its top and providedwith tracks, an antitriotion element in the carrier having end hearingsor trunnions engaging said tracks, a bearing member loosely mounted inthe carrier for engagement with the antit'riction element, a fillerplate in the open top of the carrier, and a rocking member looselymounted between the filler plate and said bearing member.

15. An antit'riction bearing comprising a carrier, antit'riction meansin said carrier, a bearing member loosely mounted in the carrier forengagement with the antifriction means, a filler plate in the carrier,and a rocking member loosely mounted between the tiller plate and saidbearing member, said rocking member being rounded and the filler platebeing complementally formed to en the rounded rocking member.

16. An antitriction bearing comprising a carrier open at its top andprovided with tracks, antifriction means in the carrier having endbearings or trunnions engaging said tracks, a bearing member looselymounted in the carrier for engagement with the antifrict-ion element, afiller plate in the open top of the carrier, a rocking member looselymounted between the tiller plate and said bearing member, and means forfastening the filler plate to the carrier.

17. An antiiriction bearing comprising an open topped carrier, anantitriction element provided with end hearings or trunnions and adaptedto be inserted into the carrier through its open top, and tracks in thecarrier adapted for engagement by said trunnions, the walls of thecarrier having oppositely disposed notches providing oppositely disposedpassage ways extending indirectly from the open side of the carrier tothe tracks through which said trunnions are adapted to pass.

18. An antitriction bearing comprising an open topped carrier, anantilriction element adapted to be inserted into the carrier through itsopen top and provided with end bearings or trunnions, tracks in thecarrier adapted for engagement by said trunnions,

the walls of the carrier having pairs of oppositely disposed notches topermit the trunnions to pass from the open side of the carrier to thetracks, the upper or receiving ends of one pair of said notches beingoffset from the inner ends 01 the other pair of notches.

19. An antitriction bearing comprising an open topped carrier, anantitriction element adapted to be inserted into the carrier through itsopen top and provided with end hearings or trunnions, tracks in thecarrier adapted for engagen'ient by said trunnions, the walls of thecarrier having pairs of oppositely disposed notches to permit thetrunnions to pass from the open side or" the carrier to the tracks, onepair of said notches being otiset with respect to the other pair, andthe notches of each pair being connected by a transverse connectingpassage.

20. An antiirictionbearing comprising an open topped carrier, anmitit'riction element provideo with end hearings or trunnins and adaptedto be inserted into the carrier through its open to tracks in thecarrier adapted for engagement by said trunnions, the walls of thecarrier having pairs of oppositely disposed notches providing oppositelydisposed passagrgeways from the open side of the carrier to the trackthrough which said trunnions are adapted to pass, the outer ends of onepair of said notches being oilset cm the inner ends of the other pair,and a member removably mounted in the carrier to furnish a tread for theantitriction element and to lock the said anti friction element againstdisplacement from the carrier.

21. An antitriction bearing comprising a carrier open at its top andbottom, an antitriction element provided with end hearings or trunnionsand adapted to be inserted into the carrier through the open top thereofand to extend through the open bottom of the carrier for contact with alower b zaring member, tracks in the carrier adapted for engagement bysaid triiinnions, upper and lower strengthening ribs made integral withthe inner sides of the side walls ot the carrier, the said ribs beingprovided with notches through hich said trunnious are adapted to pass.the notches of the upper ribs being out oi line with those of the lowerribs, and a member remorably mounted on the carrier to tt'urnish anupper tread tor the antitriction element.

22. An antilriction bearing comprising a carrier open at its top andbottom and provided at the upper margins of its side walls with lockingflanges, an antili'riction oleinent in said carrier which projectsthrough the open bottom thereof for contact with a lower bearing member,a bearing member in the carrier adapted for engagement with saidantiitriction element, and a top wall inclosing the open top of saidcarrier and provided with depending flanges adapted to engage thelocking flanges on the side walls to prevent said walls from spreadingapart. 7

23. An antitriction bearing comprising a carrier open at its top andbottom and provide( at its side walls with trunnion receiving notchesand with tracks, an antit'riction element adapted to be inserted intothe carrier through its open top and to extend through the open bottomfor contact .vith a lower hearing member and having end bear which passthrough said notches to said tra is, and means within the :arrierremovably iuterloclr nl with the upper marginal parts of the side wallsof the carrier to prevent spreading apart of said side walls.

24:. An ai'ititriction bearing comprising a carrier open at its top andprovided with tracks, an antitriction element in the carrier having endhearings or trunnions engaging said tracks, a. bearing member looselymounted in the carrier for engage-- ment with the antitriction member, afiller plate in the open top of the carrier, and a rocking memberloosely mounted between the tiller plate and said bearing men'ibcr, saidtiller plate having interlocking onrgement with the side w. lls of thecarrier at the open side thereof to prevent spreading apart of said sidewalls.

25. An antitriction bearing con'iprising a carrier which is open at itstop and bottom and provided with tracks, an antitrictiou element in saidcarrie* arranged to project through the open bottom of the carrier andprovided with conical trunnions adapted to rest and roll on said tracks,the side walls of the carrier being provided with downwardly openingJ-shaped notches through which the trunnions are adapted to pass to saidtracks, and a member movably fixed in said carrier and adapted tofurnish an upper tread for the antitriction element.

26. An antifriction bearing comprising a carrier which is open at itstop and bottom and provided with tracks, an antifriction element in saidcarrier arranged to project through the open bottom of the carrier andprovided with conical trunnions adapted to rest and roll on said tracks,the side walls of the carrier being provided with downwardly openingnotches through which the trunnions are adapted to pass to said tracks,and a member confined in said carrier and adapted to furnish an uppertread for the antifriction element, said member being movable about anaxis at right angles to its I line of contact with said antifrictionelement whereby it fully contacts with said antilriction element at alltimes when in engagement with it.

27. An antifriction bearing comprising upper and lower bearing members,an interposed antifrietion element, and resilient means carried by oneof said bearing members tending to sinmltaneously return saidantiit'riction element to predetermined point and to lock it againstvertical movement.

In testimony, that I claim the foregoing as my invention I aiiix mysignature in the presence of two witnesses, this 3rd day of December A.D. 1908.

EDWIN S. WOODS.

Witnesses G. R. .Vnauxs, T. H. ALmrnns.

